Franz Kalckhoff
Dr. Franz Kalckhoff (1860-yil 30-noyabr – 1955-yil 13-fevral) – nemis filatelisti. U 1934-yilda Taniqli filatelistlar ro‘yxatini imzolagan[1].
Manbalar
- ↑ Background notes on The Roll of Distinguished Philatelists September 2011, Roll of Distinguished Philatelists Trust, London, 2011. Archived here.
 | Filatelistga oid ushbu maqola chaladir. Siz uni boyitib, ZiyoSferaga yordam berishingiz mumkin. |